20438505

素因数分解:

$3^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{26717}}^1$

素因数の和:26745

約数の個数: 24

約数和(自身を含む): 37512072

約数和(自身を除く): 17073567

約数列:

[1, 3, 5, 9, 15, 17, 45, 51, 85, 153, 255, 765, 26717, 80151, 133585, 240453, 400755, 454189, 1202265, 1362567, 2270945, 4087701, 6812835, 20438505]

約数ペア:

[(1, 20438505), (3, 6812835), (5, 4087701), (9, 2270945), (15, 1362567), (17, 1202265), (45, 454189), (51, 400755), (85, 240453), (153, 133585), (255, 80151), (765, 26717)]